Issue #89 Add star rating gem to gemfile and gemfile.lock
Issue #89 Fix routes
Issue #89 Fix show idea view to add rating table
Issue #89 Fix form for rating
Issue #89 Add require star rating to application js and css
Issue #89 Fix user_ratings_controller methods

Add respond_to blocks and average rating calculations
Issue #89 Fix rating_ballot.js asset
Issue #89 Fix user_ratings_controller_spec.rb
Issue #89 Remove unneeded create and update js.erb files for UserRatings
Issue #89 Fix average rating calculations